Simultaneous dyeing and durable press finishing of cotton fabrics with acid dyes bearing the different molecule structure and durable press finishing agent (DP agent abbr.) based on modified DMDHEU were investigated b...Simultaneous dyeing and durable press finishing of cotton fabrics with acid dyes bearing the different molecule structure and durable press finishing agent (DP agent abbr.) based on modified DMDHEU were investigated by using the pad-dry-cure process. Some factors affecting the process, such as structure of acid dyes, DP agent, catalysts and curing temperature were discussed. The dyed and finished fabrics were evaluated with respect to color strength, fixation, crease recovery angle, breaking strength and fastness properties. The results indicate that structure of acid dyes has a striking effect on the color strength of dyed and finished cotton fabric. The color strength and dry crease recovery angle of dyed and finished cotton fabric increases, whereas breaking strength decreases with increasing concentration of DP agent. It is necessary for ammonium nitrate to serve as catalyst. It is found that relatively satisfactory properties of dyed and finished cotton fabric can be obtained with appropriate adjustment of treating conditions.展开更多
Crystal structure of ethanol coordinated 1,8,15,22-tetra(2,2,4-trimethyl-3-pentoxy) phthalocyaninatocobalt (C64H80N8O4Co2C2H5OH, Mr = 1176.43) was determined by X-ray diffrac- tion methods. The crystal is of monoclini...Crystal structure of ethanol coordinated 1,8,15,22-tetra(2,2,4-trimethyl-3-pentoxy) phthalocyaninatocobalt (C64H80N8O4Co2C2H5OH, Mr = 1176.43) was determined by X-ray diffrac- tion methods. The crystal is of monoclinic, space group P21/c with a = 16.4294(4), b = 8.0560(2), c = 24.3654(7) ? ?= 98.3680(8)? Z = 2, V = 3190.6(1) ?, Dc = 1.225 g/cm3, F(000) = 1262, (MoK? = 0.326 mm-1, the final R = 0.0865 and wR = 0.2737 for 4787 observed reflections with I ≥ 2(I). The bulky branched alkyloxy substituents lead to a one structural isomer and space the phthalocyanine molecules where two ethanol molecules coordinate to the cobalt atom from two sides of each molecule.展开更多
The realization of tunable nonlinear optical(NLO)responses in a single nano-/micro-structure is extremely important.However,in lack of effective ways to integrate multiple performances,it still faces severe limitation...The realization of tunable nonlinear optical(NLO)responses in a single nano-/micro-structure is extremely important.However,in lack of effective ways to integrate multiple performances,it still faces severe limitations during applications.Herein,we demonstrate a wavelength-dependent NLO micro-structure based on host-guest metal-organic framework(MOF)materials through encapsulating linear dye molecules into periodic one-dimensional(1D)channels.The confinement to non-centrosymmetric polar dye molecules enhances the second-/third-order NLO responses of the hybrid crystals,causing obvious two-photon luminescence(TPL),second harmonic generation(SHG)and third harmonic generation(THG)responses in the as-prepared composites.The highly ordered structures of MOFs impart spatial regulation on the linear dye molecules to realize orientation alignment,resulting in the polarized anisotropy emission.NIR-to-NIR(NIR,near-infrared region)two-photon pumped lasing is realized with the natural whispering gallery mode resonance cavities of MOFs under the excitation of a 1200-nm fs laser.Furthermore,tunable NLO properties such as TPL,SHG and THG are achieved through switching the incident excitation wavelength from 800 to 1500 nm.Such hybrid materials with tunable NLO responses may open a new avenue toward designing multifunctional NLO devices in the future.展开更多
文摘Simultaneous dyeing and durable press finishing of cotton fabrics with acid dyes bearing the different molecule structure and durable press finishing agent (DP agent abbr.) based on modified DMDHEU were investigated by using the pad-dry-cure process. Some factors affecting the process, such as structure of acid dyes, DP agent, catalysts and curing temperature were discussed. The dyed and finished fabrics were evaluated with respect to color strength, fixation, crease recovery angle, breaking strength and fastness properties. The results indicate that structure of acid dyes has a striking effect on the color strength of dyed and finished cotton fabric. The color strength and dry crease recovery angle of dyed and finished cotton fabric increases, whereas breaking strength decreases with increasing concentration of DP agent. It is necessary for ammonium nitrate to serve as catalyst. It is found that relatively satisfactory properties of dyed and finished cotton fabric can be obtained with appropriate adjustment of treating conditions.
基金Supported by the Science Foundation of Fujian province and the Test Foundation of Universities of Fujian province
文摘Crystal structure of ethanol coordinated 1,8,15,22-tetra(2,2,4-trimethyl-3-pentoxy) phthalocyaninatocobalt (C64H80N8O4Co2C2H5OH, Mr = 1176.43) was determined by X-ray diffrac- tion methods. The crystal is of monoclinic, space group P21/c with a = 16.4294(4), b = 8.0560(2), c = 24.3654(7) ? ?= 98.3680(8)? Z = 2, V = 3190.6(1) ?, Dc = 1.225 g/cm3, F(000) = 1262, (MoK? = 0.326 mm-1, the final R = 0.0865 and wR = 0.2737 for 4787 observed reflections with I ≥ 2(I). The bulky branched alkyloxy substituents lead to a one structural isomer and space the phthalocyanine molecules where two ethanol molecules coordinate to the cobalt atom from two sides of each molecule.
基金the National Natural Science Foundation of China(51632008,U1609219 and 61721005)。
文摘The realization of tunable nonlinear optical(NLO)responses in a single nano-/micro-structure is extremely important.However,in lack of effective ways to integrate multiple performances,it still faces severe limitations during applications.Herein,we demonstrate a wavelength-dependent NLO micro-structure based on host-guest metal-organic framework(MOF)materials through encapsulating linear dye molecules into periodic one-dimensional(1D)channels.The confinement to non-centrosymmetric polar dye molecules enhances the second-/third-order NLO responses of the hybrid crystals,causing obvious two-photon luminescence(TPL),second harmonic generation(SHG)and third harmonic generation(THG)responses in the as-prepared composites.The highly ordered structures of MOFs impart spatial regulation on the linear dye molecules to realize orientation alignment,resulting in the polarized anisotropy emission.NIR-to-NIR(NIR,near-infrared region)two-photon pumped lasing is realized with the natural whispering gallery mode resonance cavities of MOFs under the excitation of a 1200-nm fs laser.Furthermore,tunable NLO properties such as TPL,SHG and THG are achieved through switching the incident excitation wavelength from 800 to 1500 nm.Such hybrid materials with tunable NLO responses may open a new avenue toward designing multifunctional NLO devices in the future.
